Information distribution system, information distribution server, mobile terminal, and information distribution method

ABSTRACT

There is provided an information distribution system capable of distributing a content to a mobile terminal in a predetermined area, distributing content guide information to the mobile terminal, and distributing the content selected by the mobile terminal, within the area. The information distribution system includes an information distribution server, a mobile terminal, and a content DB. The content DB contains content information to be provided to the mobile terminal and information on the area to which the content is provided. The information distribution server distributes the content guide information to the mobile terminal. According to this content guide information, the mobile terminal performs a content distribution request. The information distribution server judges the position of the mobile terminal according to position judgment means. When the mobile terminal is in the distribution area of the content requested, the content is downloaded.

TECHNICAL FIELD

The present invention relates to an information distribution system and,information distribution server, a mobile terminal and an informationdistribution method for distributing information to a mobile terminalsuch as a mobile telephone or PDF, and more particularly, to aninformation distribution system, an information distribution server, amobile terminal and an information distribution method, whereby theinformation distribution server is equipped with a content database thatassociates and memorizes content downloadable to a mobile terminal, orcontent data indicating the registration location of such content, andarea information indicating the specific area to which such content maybe downloaded by the mobile terminal, so that when user bearing themobile terminal moves into a particular area, specific contentassociated with the area information in question is distributed to themobile terminal.

RELATED ART

In light of the remarkable progress in telecommunications technology andinformation processing technology in recent years, it has becomepossible for users of computers installed in businesses and homes toaccess, via Internet networks, servers and websites offering all kindsof data communication services and to obtain desired public informationor receive desired services. Moreover, the Internet now serves as aneffective business tool in various ways, as business enterprises, suchas stores, eating and drinking establishments as well as localgovernment bodies, etc., now use it to transmit messages or offer theirservices via their websites to clients and customers. In addition, bankscan now offer their banking services via the Internet while certainfirms can offer mail order marketing services and so forth.

Further, the range of such data communication services has recentlyexpanded to include not only terminals such as stationary computerdevices in businesses and homes, but also mobile terminals that peoplecan carry on their person. Data communication services provided bymobile telephones are a typical instance, and information communicationservices allowing mobile telephones to connect with various informationdistribution computer systems via wireless communication networks so asto receive desired information (content) through downloading and besaved in the mobile terminal are now available in a variety of fields.Recently, navigation services that offer real-time route guidance todestinations have also become available.

When visiting a place in an unfamiliar area people have been accustomedto rely on an atlas or similar reference material to locate roads,landmarks and addresses depicted in the maps in question. Or, in avehicle equipped with a car navigation system (below, “CNS”), travelersare assisted in reaching their destination by running the CNS andentering the destination name, upon which they obtain guidanceinformation displayed on a monitor screen and/or delivered as audiooutput (navigation information).

The principle of operating the CNS involves the Global PositioningSystem (“GPS”), whereby a vehicle equipped with CNS receives through aGPS antenna GPS signals transmitted from multiple GPS satellites inflight above the earth, and fixes its own position by analyzing data onthe satellites' positions, data on the distance between the satellitesand the receiver, and clock data, etc., that are contained in such GPSsignals. The GPS satellites must be at least four in number. By itself,the GPS generally fixes a certain position with an accuracy of slightlyover 10 m, but if DGPS (Differential GPS) is available, suchposition-fixing accuracy can be enhanced by 5m or less.

As mentioned above, recent years have seen great strides of improvementin the capabilities of mobile telephones, Personal Handyphone System(“PHS”) devices and other mobile communication terminal equipment, whichare progressively becoming more multifunctional. In particular, asidefrom the basic telephone communication function their data communicationfunctions have significantly increased, so that via the Internet theycan now offer various kinds of data communication services to theirusers. One of these is route navigation service, and attempts areunderway to provide not only drivers of automobiles, but users of mobiletelephones as well with route guidance from their present location to acertain destination.

The present inventors have already disclosed in Japanese Laid-OpenPatent Publication No. 2003-214860 (hereinafter “Patent Document 1”) anavigation system that uses a mobile telephone as terminal. As shown inFIG. 8, this navigation system is composed of a mobile terminal (mobiletelephone) 1 connected to a mobile communications network 2, and a datacommunication service center (information distribution computer system)3, where the mobile terminal 1 receives desired data communicationservices by connecting to the data communication service center 3. Wherethe mobile terminal 1 is a mobile telephone or PHS, telephone calls canbe made to desired recipient terminals (fixed-line telephones, mobiletelephones, PHSs, etc) through mobile communications base stations ortelephone line networks, via the mobile communication network 2. Asdescribed below, the data communication service center 3 is configuredto implement route navigation services in response to requests made bythe mobile terminal 1.

In particular, when a route search request containing positionalinformation on the starting point and destination location is issuedfrom the mobile terminal 1, the information distribution computer systemof the data communication service center 3 uses road data stored in astorage means to find the optimal route from the starting point to thedestination location, and temporarily stores data on the route foundinto the storage means, as guidance route data. When the mobile terminal1 makes a display map data request specifying positional coordinates anda guidance route, the information distribution computer system of thedata communication service center 3 reads out the map data for avector-style map display of the area around the specified positionalcoordinates and data for the specified guidance route from the storagemeans, then converts such guidance route data into vector data to depictroads in particular colors and incorporates the same into the map data,which are then transmitted to the mobile terminal 1, the source of therequest.

The mobile terminal 1 is equipped with a GPS receiver (not shown FIG.8), for fixing its present position during motion, and carries out GPSposition-fixing at particular intervals. If the results of GPS positionfixing yield some inadequacy, this will arise in the display mapinformation, and the mobile terminal 1 will issue a request for displaymap information to the information distribution computer system of thedata communication service center 3. Further, such informationdistribution computer system is provided with a storage means, in whichroad data (map data) and data on buildings and other landmarks,intersections and street names, etc., at various locations indicated inthe maps, are stored. Such data are updated and maintained throughinformation distribution computer systems 5, 6 or similar systems thatimplement distribution of maps via an Internet network 4.

As the recipients targeted by data communication services shift fromusing stationary computer devices to portable terminals, serviceproviders which take advantage of the features of moving terminaldevices have become in demand. From the point of view of users, it isthe convenience of being able to access any desired servers and websitesand receive particular services at any time regardless of theirlocation, while service providers value the benefits derived fromattracting users who are in motion, or the increased appeal to usersbecause of the availability of specific information services when theyare situated in certain areas.

For example, it is possible to attract users and achieve differentiationfrom rivals by providing people who may be in a restaurant, theme park,or tourist spot, with information (content) that can be obtained onlywhere they are located, through their mobile terminals. This kind ofservice has been proposed for the advertising sector. For instance, inJapanese Laid-Open Patent Publication No. 2003-99670 (see FIG. 1,hereinafter “Patent Document “2”),the possibility of displayingadvertisements prepared by advertising entities existing within theneighboring area of the current location of the mobile object (vehicle)such as a bus, through the receiving terminal installed in the mobileobject, has been disclosed.

The technology disclosed in Patent Document 2 comprises a mobile objectequipped with a content receiving display terminal, advertising entitiesthat post digital content to such mobile object, and a contentdistribution site that is connected to the Internet and stores, manages,and distributes such content to the mobile object via a wirelessdistribution network. The content receiving display terminal has aposition detection means that employs a position information detectionservice to output current position information, while the contentdistribution site is equipped with means for managing the settingspertinent to the distribution conditions, including distribution targetareas, periods and time zones corresponding to the content prepared byadvertisers. The content receiving display terminal sends positioninformation and mobile object information to the content distributionsite at predetermined times and the content distribution site thenreceives the position information, utilizes such position informationand the distribution conditions and current time information as criteriato select the content to be distributed, and transmits it for display.

DISCLOSURE OF INVENTION

In Patent Document 1, the technology disclosed pertains to the displayof advertisements or other content to an unspecified number of people invehicles, which is not without disadvantages, specifically in the casewhere its application is intended for a data communication servicetargeting mobile terminals carried by individuals. First, theadvertisement information or other content is distributed one-way anddisplayed by mobile objects situated within the area, and usersreceiving the content may be unnecessarily inconvenienced as they arenot at liberty to choose whether to download or reject such content, ifit is not useful.

Secondly, vehicles located outside the area in question cannot access orare otherwise unable to find out such information content that may beunique to the area. In other words, individual users will only find outthe existing content provided in a specific area only as they enter thearea, and thus there would be no means of attracting the attention ofusers situated outside such area and draw them thereto.

As a result of numerous and varied investigations, the present inventorsfound that by equipping a system with a content database that associatesand memorizes content downloadable to a mobile terminal, or content dataindicating the registration location of such content, and areainformation indicating the specific area to which such content may bedownloaded by the mobile terminal, and by configuring the system in suchmanner that guidance information on the content downloadable by themobile terminal is distributed to the mobile terminal, and that when theuser carrying the mobile terminal moves into a specific area and thedistribution conditions are complied with, specific content associatedwith the area information in question will be distributed to the mobileterminal in response to a distribution request from the mobile terminal,the aforementioned disadvantages can be eliminated.

Thus, the present invention aims to provide an information distributionsystem/method equipped with a content database that associates andmemorizes content downloadable to a mobile terminal, or content dataindicating the registration location of such content, and the specificarea to which such content may be downloaded by the mobile terminal,distributes to the mobile terminal guidance information on the contentthat the mobile terminal can download, and distributes the content dataafter determining that the position of the mobile terminal matches thearea information.

MEANS TO RESOLVE THE PROBLEMS

With the objective of resolving said problems, the invention accordingto claim 1 relates to an information distribution system that comprisesan information distribution server and a mobile terminal, where:

the information distribution server is equipped with a content databasethat associates and memorizes content downloadable to a mobile terminal,or content data indicating the registration location of such content,and area information indicating the specific area to which such contentmay be downloaded by the mobile terminal and the informationdistribution server is equipped with:

a content guide information distribution means that transmits guidanceinformation to the mobile terminal on the content downloadable by themobile terminal;

a distribution request reception means that receives contentdistribution requests from the mobile terminal;

a position judgment means that determines the position of the mobileterminal; and

a distribution enabled/disabled decision means that checks the positionof the mobile terminal as determined by the position judgment meansagainst the area information associated with the content whosedistribution is requested and decides whether to distribute the contentdata in question;

and where the mobile terminal is equipped with:

a position information transmission means that sends information on thecurrent position of the mobile terminal to the information distributionserver; and

a distribution request means that makes distribution requests to theinformation distribution server and selects content to be downloadedaccording to the content guide information distributed by theinformation distribution server;

and the system is configured in such manner that if the area informationassociated with the content whose distribution is requested matches theposition of the mobile terminal, the information distribution servertransmits the content data in question to the mobile terminal.

The invention according to claim 2 pertains to the informationdistribution system of claim 1, wherein the position informationtransmission means is composed of a current position detection means anda current position information transmission means that transmits currentposition information generated by the current position detection means,and where the position judgment means determines the current position ofthe mobile terminal according to current position information receivedfrom the mobile terminal in question.

The invention according to claim 3 relates to an informationdistribution system that comprises an information distribution serverand a mobile terminal, where:

the information distribution server is equipped with a content databasethat associates and memorizes content downloadable to the mobileterminal, or content data indicating the registration location of suchcontent, and area information indicating the specific area to which suchcontent may be downloaded by the mobile terminal, and the informationdistribution server is equipped with:

a distribution request reception means that receives contentdistribution requests from the mobile terminal;

a route search means that carries out route searches according to routesearch requests sent from the mobile terminal; and

a route search result transmission means that transmits the results ofthe route searches to the mobile terminal;

and where the mobile terminal is equipped with:

a current position detection means that detects the current position ofthe mobile terminal;

a current position information transmission means that transmits currentposition information generated by the current position detection means:

a route search request transmission means that transmits route searchrequests to the information distribution server;

a distribution request means that makes distribution requests to theinformation distribution server and selects content to be downloadedaccording to the content information distributed by the informationdistribution server; and

a reception means that receives content data from the informationdistribution server;

and the system is configured in such manner that if the results of aroute search conducted by the route search means show that the mobileterminal is passing through an area that matches the area information,said information distribution server will, via the route search resulttransmission means, add the content guide information matching the areainformation to the route search results as a download point, andtransmit the same.

The invention according to claim 4 relates to an informationdistribution server equipped with a content database that associates andmemorizes content downloadable to a mobile terminal, or content dataindicating the registration location of such content, and areainformation indicating the specific area to which such content may bedownloaded by the mobile terminal, and distributes the content datarequested by the mobile terminal and the information distribution serveris equipped with:

a content guide information transmission means that transmits terminalguide information to the mobile terminal on the content downloadable bythe mobile terminal;

a distribution request reception means that receives contentdistribution requests from the mobile terminal;

a position judgment means that determines the position of the mobileterminal; and

a distribution enabled/disabled decision means that checks the positionof the mobile terminal as determined by the position judgment meansagainst the area information associated with the content whosedistribution is requested and decides whether to distribute the contentdata in question;

and the information distribution server is configured in such mannerthat if the area information associated with the content whosedistribution is requested matches the position of the mobile terminal,the information distribution server transmits the content data inquestion to the mobile terminal.

The invention according to claim 5 relates to the informationdistribution server of claim 4, with the further features that theinformation distribution server is equipped with a current positioninformation reception means that receives current position informationgenerated by the mobile terminal according to the output of the currentposition detection means, and the position judgment means determines thecurrent position of the mobile terminal according to current positioninformation received from the mobile terminal in question.

The invention according to claim 6 relates to an informationdistribution server equipped with a content database that associates andmemorizes content downloadable to a mobile terminal, or content dataindicating the registration location of such content, and areainformation indicating the specific area to which such content may bedownloaded by the mobile terminal, and distributes the content datarequested by the mobile terminal and is further equipped with:

a current position information reception means that receives currentposition information sent by the mobile terminal;

a distribution request reception means that receives contentdistribution requests from the mobile terminal;

a route search means that carries out route searches according to routesearch requests sent from the mobile terminal; and

a route search result transmission means that transmits the results ofthe route searches to the mobile terminal;

and the information distribution server is configured in such mannerthat if the results of a route search by the route search means showthat the mobile terminal is passing through an area that matches thearea information, the information distribution server will, via theroute search result transmission means, add the content guideinformation matching the area information to the route search results asa download point, and transmit the same.

The invention according to claim 7 relates to a mobile terminal thatreceives any desired content data from an information distributionserver equipped with a content database that associates and memorizescontent downloadable to a mobile terminal, or content data indicatingthe registration location of such content, and area informationindicating the specific area to which such content may be downloaded bythe mobile terminal;

where the mobile terminal is equipped with:

a position information transmission means that sends information on thecurrent position of the mobile terminal to the information distributionserver;

a distribution request means that makes distribution requests to theinformation distribution server and selects content to be downloadedaccording to the content guide information distributed by theinformation distribution server; and

a receiving means that receives content data that is distributed to themobile terminal when the information distribution server checks theposition of the mobile terminal against the area information associatedwith the content whose distribution is requested and determines that themobile terminal is situated in an area that matches the areainformation.

The invention according to claim 8 relates to the mobile terminal ofclaim 7, wherein the position information transmission means is composedof a current position detection means and a current position informationtransmission means that transmits current position information generatedby the current position detection means.

The invention relating to claim 9 is a mobile terminal that receives anydesired content data from an information distribution server equippedwith a content database that associates and memorizes contentdownloadable to a mobile terminal, or content data indicating theregistration location of such content, and area information indicatingthe specific area to which such content may be downloaded by the mobileterminal;

where the mobile terminal is equipped with:

a current position detection means that detects the current position ofthe mobile terminal;

a current position information transmission means that transmits currentposition information generated by the current position detection means:

a route search request transmission means that transmits route searchrequests to the information distribution server;

a distribution request means that makes distribution requests to theinformation distribution server and selects content to be downloadedaccording to the content guide information distributed by theinformation distribution server; and

a reception means that receives content data from the informationdistribution server;

where the reception means is configured in such manner as to receiveroute search results to which the content guide information matching thearea information has been added by the distribution server as a downloadpoint, in the case where the route search results show that user bearingthe mobile terminal is passing through an area that matches the areainformation.

The invention according to claim 10 relates to an informationdistribution method for distributing information between a mobileterminal and an information distribution server equipped with a contentdatabase that associates and memorizes content downloadable to themobile terminal, or content data indicating the registration location ofsuch content, and area information indicating the specific area to whichsuch content may be downloaded by the mobile terminal, where theinformation distribution server is configured to execute the followingsteps:

a step in which guidance information on the content downloadable by themobile terminal is distributed to the mobile terminal;

a step in which a content distribution request is received from themobile terminal;

a step in which the position of the mobile terminal is determined;

a step in which the position of the mobile terminal as determined by theposition judgment means is checked against the area informationassociated with the content whose distribution is requested and decisionis made whether to distribute the content data in question; and

a step in which the content data is distributed to the mobile terminalin accordance with the judgment result;

and the mobile terminal is configured to execute the following steps:

a step in which information on the current position of the mobileterminal is transmitted to the information distribution server; and

a content guide information distributing step whereby content to bedownloaded is selected according to the content guide informationdistributed by the information distribution server and a distributionrequest is made to the information distribution server.

The invention according to claim 11 relates to the informationdistribution method of claim 10, wherein the mobile terminal furtherexecutes:

a step in which the current position of the mobile terminal is detected;and

a step in which the current position information generated by thecurrent position detection means is transmitted to the informationdistribution server;

and the information distribution server further executes:

a step in which the current position of the mobile terminal isdetermined according to the current position information received fromthe mobile terminal in question.

The invention according to claim 12 relates to an informationdistribution method for distributing information between a mobileterminal and an information distribution server equipped with a contentdatabase that associates and memorizes content downloadable to themobile terminal, or content data indicating the registration location ofsuch content, and area information indicating the specific area to whichsuch content may be downloaded by the mobile terminal;

where the information distribution server executes the following steps:

a step in which a content distribution request is received from themobile terminal;

a step in which a route search is conducted according to the routesearch request sent from the mobile terminal; and

a route search result transmission step in which the results of theroute search are transmitted to the mobile terminal;

and the mobile terminal executes the following steps:

a step in which the current position of the mobile terminal is detected;

a step in which current position information generated by the currentposition detection means is transmitted;

a step in which a route search request is transmitted to the informationdistribution server;

a step in which content to be downloaded is selected according to thecontent information distributed by the information distribution serverand a distribution request is made to the information distributionserver; and

a step in which content data is received from the informationdistribution computer device;

and the route search result transmission step includes the process bywhich the information distribution server will, via the route searchresult transmission means, add the content guide information matchingthe area information to the route search results as a download point,and transmit the same in the case where the route search results showthat the user bearing the mobile terminal is passing through an areathat matches the area information.

The invention according to claim 13 is an information distributionmethod that employs an information distribution server equipped with acontent database that associates and memorizes content downloadable to amobile terminal, or content data indicating the registration location ofsuch content, and area information indicating the specific area to whichsuch content may be downloaded by the mobile terminal, and distributesthe content data requested by a mobile terminal;

where the information distribution server executes the following steps:

a content guide information distributing step in which guidanceinformation on the content downloadable by the mobile terminal isdistributed to the mobile terminal;

a step in which a content distribution request is received from themobile terminal;

a step in which the position of the mobile terminal is determined;

a step in which the position of the mobile terminal as determined by theposition judgment means is checked against the area informationassociated with the content whose distribution is requested and adecision is made whether to distribute the content data in question; and

a step in which the content data is distributed to the mobile terminalin accordance with the judgment result.

The invention according to claim 14 is the information distributionmethod of claim 13, wherein the information distribution server executesa further step whereby current position information generated by themobile terminal according to the output of the current positiondetection means is received, and the current position of the mobileterminal in question is determined according to the current positioninformation received.

The invention according to claim 15 relates to an informationdistribution method that employs an information distribution serverequipped with a content database that associates and memorizes contentdownloadable to a mobile terminal, or content data indicating theregistration location of such content, and area information indicatingthe specific area to which such content may be downloaded by the mobileterminal, and distributes content data requested by the mobile terminal;

where the information distribution server executes the following steps:

a step in which a content distribution request is received from a mobileterminal;

a step in which a route search is conducted according to the routesearch request sent from the mobile terminal; and

a route search result transmission step in which the results of theroute search are transmitted to the mobile terminal;

where the route search result transmission step includes the process bywhich the information distribution server will, via the route searchresult transmission means, add the content guide information matchingthe area information to the route search results as a download point,and transmit the same in the case where the route search results showthat the mobile terminal is passing through an area that matches thearea information.

EFFECTS OF THE INVENTION

In the information distribution systems of claims 1 and 2 of theinvention, contents downloadable to a mobile terminal, or content dataindicating the registration location of such content are associated witharea information indicating the specific area to which such content maybe downloaded by the mobile terminal and are memorized by the system ina content database, and an information distribution server distributesguidance information on the downloadable content to the mobile terminal.Hence, the user, that is, the possessor of the mobile terminal, can findout what data may be accessed from whatever source, regardless of theuser's current location. Moreover, in response to a content distributionrequest from the mobile terminal, the information distribution serverwill only distribute such content data desired by the user, as it candetermine, on the basis of the current position information pertainingto the mobile terminal in question that the mobile terminal is locatedwithin the area for which the information content whose distribution hasbeen requested is available. Therefore, since the user will receive onlydesired content data, the inconvenience of receiving unwanted contentdata that is distributed one-way can be eliminated. Further, a mobiletelephone or PHS can be used as a mobile terminal, or a mobile telephoneequipped with GPS position-fixing means can be used.

The information distribution system of claim 3 of the invention is asystem equipped with navigation service capability, in which aninformation distribution computer device conducts a route search inresponse to a route search request from a mobile terminal, and if theroute search results show that the mobile terminal is passing through anarea that matches the distribution conditions, then the content guideinformation matching the area information will be added to the routesearch results and transmitted as a download point via the route searchresult transmission means. Hence the mobile terminal can find out, as apart of the route search request, the existence of content that may bedistributed in a specific area, and the user can download the same if heis interested.

In the invention of claims 4, 5, 7 and 8, an information distributionserver and mobile terminal can be provided that will compose theinformation distribution systems of claims 1 and 2, whereby the user isable to find out what content can be distributed to him in certainareas, regardless of his current location. Moreover, since he will onlyreceive desired content data, he will not be subject to theinconvenience of receiving unwanted content data distributed one-way, asin the case of prior art.

In the invention of claims 6 and 9, an information distribution serverand mobile terminal can be provided that will compose the informationdistribution system of claim 3, whereby the mobile terminal can findout, as a part of route search requests, the existence of content thatmay be distributed in a specific area, and the user can download thesame if he is interested.

In the invention of claims 10 and 11, information distribution methods(download methods) that utilize the information distribution systems ofclaims 1 and 2 can be provided, while in the invention of claim 12, aninformation distribution method (download method) that utilizes theinformation distribution system of claim 3 can be provided.

In the invention of claims 13 and 14, information distribution methodsfor the information distribution servers of claims 4 and 5 can beprovided, while in the invention of claim 15, an informationdistribution method for the information distribution server of claim 6can be provided.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic block diagram illustrating the configuration of aninformation distribution system of the present invention.

FIG. 2 is a conceptual diagram explicating the procedure by whichinformation distribution is received from the information distributionserver using the menu screen of the mobile terminal.

FIG. 3 is a flowchart illustrating the information distributionprocedure shown in FIG. 2.

FIG. 4 is a map diagram explicating the method for setting adistribution area for content.

FIG. 5 is a conceptual diagram explicating the procedure fordistributing content guide information for route guidance in response toa route search request.

FIG. 6 presents flowcharts illustrating the procedure for distributingcontent guide information as download point data for route guidance,where FIG. 6(a) represents a flowchart illustrating the processingconducted by the information distribution server and FIG. 6(b)illustrates processing conducted by the mobile terminal.

FIG. 7 is a picture of a display screen showing the download point datareferred to in FIG. 6.

FIG. 8 is a schematic block diagram illustrating an example of a relatedart information distribution system.

BEST MODE FOR CARRYING OUT THE INVENTION

Specific illustrative embodiments of the present invention will now bedescribed in detail with reference to the drawings. FIG. 1 is aschematic block diagram illustrating the configuration of an informationdistribution system of the present invention. FIG. 2 is a conceptualdiagram explicating the procedure by which information distribution isreceived from the information distribution server using the menu screenof the mobile terminal. FIG. 3 is a flowchart illustrating theinformation transmission procedure shown in FIG. 2, and FIG. 4 is a mapdiagram explicating the method for setting a distribution area forcontent. FIG. 5 is a conceptual diagram explicating the procedure fordistributing content guide information for route guidance in response toa route search request, while FIG. 6 presents flowcharts illustratingthe procedure for distributing content guide information as downloadpoint data for route guidance, where FIG. 6(a) represents a flowchartillustrating the processing conducted by the information distributionserver and FIG. 6(b) illustrates processing conducted by the mobileterminal. FIG. 7 is a picture of a display screen showing the downloadpoint data referred to in FIG. 6.

First Embodiment

The information distribution system 10 of the first embodiment of thepresent invention will now be described. The information distributionsystem 10 of FIG. 1 represents an embodiment that applies theinformation distribution service of the present invention to a systemoffering route search and route guidance services, in a manner similarto the system disclosed in Patent Document 1. The mobile terminal 20carries a GPS position-fixing device and is equipped with functions fortransmitting information on the current position of the mobile terminal20 to the information distribution server 30 and for making route searchrequests specifying the starting point and destination. The informationdistribution server 30 conducts route searches according to the routesearch requests and transmits the route search results (route guidance)to the mobile terminal 20.

As FIG. 1 shows, the information distribution system 10 includes aninformation distribution server 30 and a mobile terminal 20, such as amobile telephone, that accesses the information distribution server 30via a communications network 12. The information distribution server 30is equipped with a content database (DB) 40, which associates andmemorizes content downloadable to a mobile terminal 20, or content dataindicating the registration location of such content, and areainformation indicating the specific area to which such content may bedownloaded by the mobile terminal. The area information pertains toinformation indicating the area where specific content is to bedistributed, specifying the area by, for example, delineation vialatitude and longitude, and the content data associated with the areainformation will only be distributed if the mobile terminal 20 issituated within the area specified by the area information. Thus, thesystem is configured in such manner that when the user moves to andwithin a specific area he is able to receive distribution of specificcontent that pertains to such area as a distribution condition.

The information distribution server 30 is equipped with a content guideinformation transmission means 31 that transmits content guideinformation on the content data and/or area information to the mobileterminal 20; a position information reception means 32 for receivingposition information transmitted from the mobile terminal 20; and aposition judgment means 33 that determines the position of the mobileterminal 20 based on the position information received by the positioninformation reception means 32. The information distribution server 30is further equipped with a distribution request reception means 34 thatreceives content distribution requests from the mobile terminal 20, anda distribution enabled/disabled decision means 35 that checks theposition of the mobile terminal 20 as determined by the positionjudgment means 33 against the area information when there is a contentdistribution request from the mobile terminal 20, and decides whether todistribute the requested content. The information distribution server 30is additionally equipped with a route search request reception means 36,a route search means 37 and a route search result transmission means 38,through which the information distribution server 30 receives routesearch requests from the mobile terminal 20, conducts route searches,and distributes the route search results (route guidance) to the mobileterminal 20. The method for such route searching may employ thetechnology disclosed in Patent Document 1.

The mobile terminal 20 has an operation unit 28 provided with keys andbuttons, etc., a display unit 29 including a liquid crystal displaymodule, etc., and a position information transmission means 21. Theposition information transmission means 21 is composed of a currentposition detection means 22 including a GPS position-fixing device, anda current position information transmission means 23 that transmitscurrent position information detected by the current position detectionmeans 22 to the information distribution server 30. The informationdistribution server 30 determines the position of the mobile terminalaccording to the current position information transmitted from thecurrent position information transmission means 23 of the mobileterminal 20. The mobile terminal 20 is further equipped with adistribution request means 24 for requesting distribution of desiredcontent from the information distribution server 30; a reception means25 for receiving content guide information and content data, etc.,transmitted by the information distribution server 30; a storage means26 that stores data received from the information distribution server 30or other servers; and a route search request transmission means 27 thattransmits route search requests to the information distribution server30.

The structure of the information distribution system 10 of the presentinvention is not restricted to the above-described structure, as itcould also be a system without navigation service functions, or themobile terminal 20 could likewise be a mobile telephone withoutnavigation service capability or a mobile telephone without a GPSposition-fixing device. In the case of a mobile telephone 20 without aGPS position-fixing device, the means for transmitting the positionregistration signal to the base station would correspond to the positioninformation transmission means 21, and the information distributionserver 30 can thus obtain the mobile telephone position informationregistered at the base station via the position information receptionmeans 32 and carry out position judgment via the position judgment means33.

FIG. 2 is a conceptual diagram explicating the procedure for receivingan information transmission from the information distribution server 30using the menu screen of a mobile terminal 20 which is a mobiletelephone. First, as shown in FIG. 2, in order that the mobile terminal20 can connect with the information distribution server 30 the operationunit 28 is activated in order to access and display the menu list A10(main menu screen) on the display unit 29. From the menu list A10 onecan, for example, go to page A11, where there is a Ring tone/Karaokepage. Then, by selecting the Free audio data downloads item A12, one canview a list of contents that can be downloaded for free, such as screenA14. Such list will include the content guide information sent from theinformation distribution server 30.

For example, in the case of the XX Theme Park item-included in the A14list, a service is offered whereby the voices of popular characters ofthat theme park will be downloaded for the audio guide of the routeguidance. Together with the Kyoto Dialect Guide item, data can bedownloaded with the route guidance audio being done in the Kyotodialect. Similarly, with the Okinawa Dialect Guide item, data can bedownloaded with the route guidance done in the Okinawa dialect. Assumingthat the user of the mobile terminal 20 is in Kyoto, selecting KyotoDialect Guide in A14 will display a page to confirm downloading of audiodata in the Kyoto dialect, such as screen A13 and if Okinawa DialectGuide were selected, screen A14 will bring up a display to the effectthat the download is not possible, since the current location is notOkinawa. This expresses the desire of the audio data's provider, forexample the Tourist Association of Okinawa Prefecture, that the downloadservice be made available only to people who come to Okinawa.

The procedure for providing the above-described information distributionservice is realized through exchanges between the informationdistribution server 30 and the mobile terminal 20, as shown in theflowchart in FIG. 3. The processing involved in steps S10 to S15 in FIG.3 represents processing conducted by the mobile terminal 20 while theprocessing involved in steps S20 to S25 represents processing performedby the information distribution server 30. By activating the operationunit 28 of the mobile terminal 20, a menu screen for the datacommunication services will be displayed to the user on the display unit29 (step S10). The information in each stratum of menu screens A11 toA14 in FIG. 2 may refer to screen information that is prepared accordingto the content guide information sent in advance from the informationdistribution server 30 in step S20 and stored in the mobile terminal 20.Alternatively, the applicable screen information may be transmitted fromthe information distribution server 30 whenever a screen that containscontent guide information is reached, for example screen A14 in FIG. 2,as going through the screen strata can be done by means of the operationunit 28 of the mobile terminal 20. In the case where pre-transmittedscreens are stored in the mobile terminal 20, when there is an update tothe screen information, processing that causes the updated screeninformation to be sent from the information distribution server 30 tothe mobile terminal 20 the first time that the mobile terminal 20selects the screen in question following the update, will be necessary.

In step S12, when the mobile terminal 20 displays screen A14 as shown inFIG. 2 and the user selects from this screen some content fordownloading, for example, Kyoto Dialect Guidance, then a request fordistribution of the content will be sent to the information distributionserver 30, constituting step S13. Upon receiving the contenttransmission request in step S21, the information distribution server 30will determine the position of the mobile terminal 20 in step S22. Thisposition judgment is carried out according to the current positioninformation pertaining to the mobile terminal 20 that was received bythe position information reception means 32. This current positioninformation refers to information on the current position of the mobileterminal 20 that it detected via the current position detection means 22and transmitted through the current position information transmissionmeans 23. Where the mobile terminal 20 is a mobile telephone that is notequipped with a GPS position-fixing device, the process of positionregistration that the mobile telephone implements with the base stationmay be employed, as mentioned earlier.

Next, in step S23, the information distribution server 30 checks whetherthe current position of the mobile terminal 20 is within the areaspecified in the area information associated with the content. If thecurrent position of the mobile terminal 20 is not within the areaspecified as a distribution condition for the content whose distributionwas requested, the information distribution server 30 will respond “Cannot transmit” to the mobile terminal in step S24. If it is within sucharea, in step S25, content data such as the URL from which the contentcan be downloaded, the file name and serial number for the contentstored there, and so forth, are sent to the mobile terminal 20. In stepS14, the mobile terminal-20 displays the response received from theinformation distribution server 30. Then, in accordance with the contentreceived, either A13 or A15 in FIG. 2 will be displayed. If the URL fordownloading is sent, it would mean that reception has been approved, andas a result the mobile terminal 20 will execute content downloadprocessing in step S15, thus completing the series of processingfunctions.

Where the content consists of audio information such as voice guidancein the Kyoto or Okinawa dialect or of a specific character, the data isprepared in the same format as the standard voice guidance data and madeto be substitutable for the standard voice guidance. Area informationshowing the area to which it is downloadable would be associated withthis voice data file and memorized in the content DB 40. For example,the central portion of the area of the theme park in question will, asshown in FIG. 4, be delineated by latitude X1, X2 and longitude Y1, Y2settings, and be associated as area information with the applicablecontent data, such that only a person who has entered the theme park candownload the voice guidance data for the theme park's unique charactersusing the mobile terminal 20. Upon making a content distribution requestto the information distribution server 30 while located within sucharea, the mobile terminal 20 will be able to receive distribution of thecontent data in question and download the content. The area set in theexample in FIG. 4 extends over more than 300 meters square, which meansthat considering the accuracy of the GPS position-fixing device carriedby the mobile terminal 20, the distribution condition will definitely bemet.

In the case where the mobile terminal 20 has already downloaded the samecontent (data), a message such as “Already downloaded. Change voiceguidance data?” could be displayed in step S14 if checking of the filename or serial number conducted by the mobile terminal 20 yields theresult that the same data has been stored. Further, although theforegoing procedure pertains to an example where the informationdistribution server 30 has sent the URL through which the requestedcontent or similar data could be downloaded to the mobile terminal 20,the configuration could alternatively be such that the content isdownloaded from the information distribution server 30 directly to themobile terminal 20 if the information distribution server 30 alreadyholds such content.

Moreover, although the foregoing description refers to a situation wherethe mobile terminal 20 receives a “Can not transmit” response from theinformation distribution server 30 upon sending a content distributionrequest, thereby notifying the user that there is a distribution arealimitation on the requested content, an alternative mode is possiblewhereby content guide information in the form of a list of contents maybe instantly referred to and their distribution conditions are providedto the mobile terminal 20. If the content guide information isvoluminous, a mode would be possible in which the contents are drawn upinto genre-by-genre lists for selection.

Second Embodiment

FIG. 5 is a conceptual diagram illustrating the procedure forimplementing distribution of content in combination with route searchand route guidance in the information distribution system 10 of FIG. 1.As FIG. 5 shows, after the user moves from the menu list on the mainmenu screen A10 to screen A11 and thence to the navigation screen (page)A22, information on the current position of the mobile terminal is sentto notify the information distribution server 30. Then, when theamusement park is selected as destination from the categories displayedon screen A23, a screen A25 will be displayed to allow the user toselect route guidance or map displays to reach the destination amusementpark, together with POIs (points of interest) in the vicinity thereof.At this point, the information distribution server 30 will send contentguide information to the mobile terminal 20, conveying that a contentdownload service exists. If the mobile terminal 20 is in the area thatpermits the download, notification will be made of the fact thatspecific content can be downloaded upon a screen such as A24. On theother hand, if the user has not yet proceeded to or entered the area, ascreen such as A26 will be displayed, notifying the user that it will bepossible to download specific content if the specific area is proceededto, thereby drawing the interest of the user. The processing in FIG. 5can be carried out via a procedure similar to that shown by theflowchart in FIG. 3.

Third Embodiment

FIG. 6 presents flowcharts showing another mode of the informationdistribution system 10, where FIG. 6(a) represents a flowchart showingthe processing conducted by the information distribution server 30 andFIG. 6(b) illustrates the processing conducted by the mobile terminal20. This mode refers to a method whereby the information distributionserver 30 adds content guidance information as a download point to theroute search results and sends such information to the mobile terminal20. In the route searching process, after receiving a route searchrequest from the mobile terminal 20, the information distribution server30 searches the content DB 40 item by item to determine whether themobile terminal 20 is passing through an area for which content data hasbeen established, and for every area through which the mobile terminal20 passes, adds guidance information in advance on downloadable contentas a download point to the route search results (route guidance), beforedistributing such information to the mobile terminal 20. In this manner,upon reaching the download point during the process of receiving theroute guidance, the mobile terminal 20 will learn of the existence ofdownloadable content and be able to perform the processing to downloadsuch content.

More precisely, in step S50, the information distribution server 30conducts route search in response to a route search request from themobile terminal 20 and prepares route guidance data. During suchprocess, in step S51, the information distribution server 30 consultsthe area information in the content DB 40 and searches the areas thatthe route, along which the mobile terminal 20 is to be guided, will passthrough. If the mobile terminal 20 passes through any of the areassearched, guidance information on the content downloadable in such areais added as a download point to the route search results, guidancepoints or other data, in step S52. In step S53, the informationdistribution server 30 determines whether there is still any relevantarea information and if so, returns to step S51 and repeats theprocessing up to step S53 until no more area information remains. Ifthere is no more area information, then the information distributionserver 30 transmits the route search results, guidance points or otherdata, plus the download point data, to the mobile terminal 20, thusterminating the processing, in step S54.

During the route guidance, in step S60, the mobile terminal 20 fixes thecurrent position at particular intervals, transmits the positioninformation to the information distribution server 30, and displays onthe display unit 29 the map information and route search resultstransmitted from the information distribution server 30. For purposes ofinterpreting the route search results data, the technology disclosed inPatent Document 1 can be applied, in which case the informationdistribution server 30 will read out map data for a vector-style mapdisplay of the area around the positional coordinates corresponding tothe route along which the mobile terminal 20 is to be guided, as well asguidance route data obtained in the route search. The informationdistribution server 30 will then convert such guidance route data intovector data for depicting roads in particular colors and incorporatesuch data into the map data, which will then be transmitted to themobile terminal 20, the source of the route search request.

Moreover, guide point data for calling up voice guidance in relation tomaking right or left turns, etc., at intersections and similarinstructions can be added at applicable intersection positions in theroute guidance (route search results), and when the mobile terminal 20reaches certain guide points, the particular voice guide will be calledup to provide the user with spoken-guidance. Similarly, guidanceinformation on the content downloadable within the area will be added atthe applicable area positions in the route guidance as download pointdata. Thus, while receiving route guidance, the user can view particularcontent guide information via the download point data when he enters anarea where downloadable content is offered, and processing to effectdownloading of the content data can take place on the spot if the useris interested in such content.

More precisely, following the processing in step S61, if the mobileterminal 20 comes to a guidance point in step S62 while receiving routeguidance, voice guidance will be called up in accordance with the datafor the guidance point. For example, when an intersection is reached,the voice guidance for that intersection will be called up and it willbe possible to receive spoken guidance on left or right turns, etc. Inthe absence of any guidance point, the mobile terminal 20 will proceedto step S64. If the mobile terminal 20 reaches a download point in stepS64, guidance information on the content downloadable within the areawill be displayed in accordance with the data for the download.

The display screen to be used is illustrated in FIG. 7, appearingtogether with vibration, sound effects and voice guidance, for example.The guidance route is displayed on the map, and “XX voice guide datahere for free” is displayed as content guide information. This displayis linked to the URL from which the content can be saved, and thecontent indicated can be downloaded to the mobile terminal 20 byselecting and confirming “Download”, in step S65. On the other hand, byselecting and confirming “Cancel”, the mobile terminal will move on tostep S66 without any processing being performed. Further, if there is nodownload point in step S64, the mobile terminal 20 will proceed to stepS66, and if the user has not yet reached his destination, the mobileterminal 20 will return to step S60 and continue the processing (routeguidance) from step S60 to step S66 until the user finally reaches hisdestination, upon which, in step S66, the mobile terminal 20 willterminate the route guidance processing.

INDUSTRIAL APPLICABILITY

As described above, the present invention makes it possible, when theuser bearing the mobile terminal 20 moves into a specific area, for theuser to be notified of the fact that content specified for that area isdownloadable, and to select and download the requisite content. Thus forexample, people touring Kyoto will be able to receive guidance in theKyoto dialect so that they can savor the local ambience to the full.Whereas the standard voice says “O-tsukare-sama deshita” when thedestination is reached (here, approximately signifying Good work!), theKyoto dialect version says “O-tsukare-san doshita”. This will remaineffective even after the user has departed Kyoto, so that the user willleave Kyoto with a good impression together with the memories. Moreover,when a certain time has passed the content will change and the audiomessage will be “Tanto aruite hokkori shiharimashita yaro” (You must beexhausted after so much walking) so that even after the data is updatedit can remain fresh and provide amusement for the user.

Further, by offering the voices of popular characters in theme parks andthe like, visitors can be attracted to visit through the lure of audiodata. Since users will not be able to download such audio data unlessthey enter the park, it will be possible to achieve extremely highadded-value for the system. In addition, the invention can also beutilized for giving out coupons and similar benefits by urgingdownloading during route guidance. Ordinary coupon distribution methodsin the related art permit time limitations but are unable to providelocal flavor. Under the conventional methods, it is problematic forestablishments to implement a nation-wide service since seasonalfestivities and school vacation periods differ from locality tolocality. The present invention however will enable individualestablishments to hand out coupons to people passing by regardless ofthe season.

Moreover, instead of the numbered entrance tickets given out by hand aspreviously mentioned, it will be possible to use the method of issuingelectronic numbered tickets to people who come within the vicinity ofthe venue of an event. The information distribution server 30 is capableof managing the quantity of tickets issued and to whom they are issued,which will be highly convenient for patronizing establishments.Moreover, the data that may be downloaded is not limited to audioguidance data for navigation. For instance, the present invention mayalso be used to offer a so-called “Ring song”, serving as the ring toneof a mobile telephone at concert venues or for people within thevicinity of a venue who were unable to get into the concert. Further, atsoccer or baseball grounds, photographs of popular players could bedistributed as standby screen data.

In addition, the application of the invention may even extend to variouscountries, as the invention may be employed to download particularlanguages in particular countries. Thus, users would be able tocustomize it to their own localities if exported to other regions suchas the EU. There would be no erroneous data downloaded, since the scopeof information would be limited to each locality. Areas are not limitedto rectangular shapes defined by latitude and longitude. More complexshapes could be formed by combining rectangles, and linking the samedata to each other. If the serial numbers assigned to content files aremade identical, duplicated downloading of the files will not occur evenif they are divided among several areas.

1. An information distribution system comprising: an informationdistribution server and a mobile terminal, where the informationdistribution server is equipped with a content database that associatesand memorizes content downloadable to the mobile terminal, or contentdata indicating the registration location of such content, and areainformation indicating the specific area to which such content may bedownloaded by the mobile terminal; and where the informationdistribution server is equipped with: a content guide informationdistribution means that transmits guide information to the mobileterminal on the content downloadable by the mobile terminal; adistribution request reception means that receives content distributionrequests from the mobile terminal; a position judgment means thatdetermines the position of the mobile terminal; and a distributionenabled/disabled decision means that checks the position of the mobileterminal determined by the position judgment means against the areainformation associated with the content whose distribution is requested,and decides whether to distribute the content data in question; andwhere the mobile terminal is equipped with: a position informationtransmission means that sends information on the current position of themobile terminal to the information distribution server; and adistribution request means that makes distribution requests to theinformation distribution server and selects content to be downloadedaccording to the content guide information distributed by theinformation distribution server; and the system is configured in suchmanner that if the area information associated with the content whosedistribution is requested matches the position of the mobile terminal,the information distribution server distributes the content data inquestion to the mobile terminal.
 2. The information distribution systemaccording to claim 1, wherein the position information transmissionmeans comprises a current position detection means and a currentposition information transmission means that transmits current positioninformation generated by the current position detection means, andwherein the position judgment means determines the current position ofthe mobile terminal according to current position information receivedfrom the mobile terminal in question.
 3. An information distributionsystem comprising: an information distribution server and a mobileterminal, where the information distribution server is equipped with acontent database that associates and memorizes content downloadable tothe mobile terminal, or content data indicating the registrationlocation of such content, and area information indicating the specificarea to which such content may be downloaded by the mobile terminal; andwhere the information distribution server is equipped with: adistribution request reception means that receives content distributionrequests from the mobile terminal; a route search means that carries outroute searches according to route search requests sent from the mobileterminal; and a route search result transmission means that transmitsthe results of the route searches to the mobile terminal; and where themobile terminal is equipped with: a current position detection meansthat detects the current position of the mobile terminal; a currentposition information transmission means that transmits current positioninformation generated by the current position detection means: a routesearch request transmission means that transmits route search requeststo the information distribution server; a distribution request meansthat makes distribution requests to the information distribution serverand selects content to be downloaded according to the contentinformation distributed by the information distribution server; and areception means that receives content data from the informationdistribution server; and the system is configured in such manner that ifthe results of a route search conducted by the route search means showthat the mobile terminal is passing through an area that matches thearea information, the information distribution server will, via theroute search result transmission means, add the content guideinformation matching the area information to the route search results asa download point, and transmit the same.
 4. An information distributionserver comprising: a content database that associates and memorizescontent downloadable to a mobile terminal, or content data indicatingthe registration location of such content, and area informationindicating the specific area to which such content may be downloaded bythe mobile terminal, and distributes the content data requested by themobile terminal; a content guide information distribution means thatdistributes guidance information to the mobile terminal on the contentdownloadable by the mobile terminal; a distribution request receptionmeans that receives content distribution requests from the mobileterminal; a position judgment means that determines the position of themobile terminal; and a distribution enabled/disabled decision means thatchecks the position of the mobile terminal as determined by the positionjudgment means against the area information associated with the contentwhose distribution is requested and decides whether to distribute thecontent data in question; and the information distribution server isconfigured in such manner that if the area information associated withthe content whose distribution is requested matches the position of themobile terminal, the information distribution server transmits thecontent data in question to the mobile terminal.
 5. The informationdistribution server according to claim 4, wherein the informationdistribution server is equipped with a current position informationreception means that receives current position information generated bythe mobile terminal according to the output of the current positiondetection means, and the position judgment means determines the currentposition of the mobile terminal according to current positioninformation received from the mobile terminal in question.
 6. Aninformation distribution server comprising: a content database thatassociates and memorizes content downloadable to a mobile terminal, orcontent data indicating the registration location of such content, andarea information indicating the specific area to which such content maybe downloaded by the mobile terminal, and distributes the content datarequested by the mobile terminal; a current position informationreception means that receives current position information sent by themobile terminal; a distribution request reception means that receivescontent distribution requests from the mobile terminal; a route searchmeans that carries out route searches according to route search requestssent from the mobile terminal; and a route search result transmissionmeans that transmits the results of the route searches to the mobileterminal; where the information distribution server is configured insuch manner that if the results of a route search by the route searchmeans show that the mobile terminal is passing through an area thatmatches the area information, the information distribution server will,via the route search result transmission means, add the content guideinformation matching the area information to the route search results asa download point, and transmit the same.
 7. A mobile terminal thatreceives any desired content data from an information distributionserver equipped with a content database that associates and memorizescontent downloadable to a mobile terminal, or content data indicatingthe registration location of such content, and area informationindicating the specific area to which such content may be downloaded bythe mobile terminal, comprising: a position information transmissionmeans that sends information on the current position of the mobileterminal to the information distribution server; a distribution requestmeans that makes distribution requests to the information distributionserver and selects content to be downloaded according to the contentguide information distributed by the information distribution server;and a receiving means that receives content data that is distributed tothe mobile terminal when the information distribution server checks theposition of the mobile terminal against the area information associatedwith the content whose distribution is requested and determines that themobile terminal is situated in an area that matches the areainformation.
 8. The mobile terminal according to claim 7, wherein theposition information transmission means comprises a current positiondetection means and a current position information transmission meansthat transmits current position information generated by the output ofthe current position detection means.
 9. A mobile terminal that receivesany desired content data from an information distribution serverequipped with a content database that associates and memorizes contentdownloadable to a mobile terminal, or content data indicating theregistration location of such content, and area information indicatingthe specific area to which such content may be downloaded by the mobileterminal, comprising: a current position detection means that detectsthe current position of the mobile terminal; a current positioninformation transmission means that transmits current positioninformation generated by the current position detection means: a routesearch request transmission means that transmits route search requeststo the information distribution server; a distribution request meansthat makes distribution requests to the information distribution serverand selects content to be downloaded according to the content guideinformation distributed by the information distribution server; and areception means that receives content data from the informationdistribution server; where the reception means is configured in suchmanner as to receive the route search results to which the content guideinformation matching the area information has been added by thedistribution server as a download point, in the case where the routesearch results show that the mobile terminal is passing through an areathat matches the area information.
 10. An information distributionmethod for distributing information between a mobile terminal and aninformation distribution server equipped with a content database thatassociates and memorizes content downloadable to the mobile terminal, orcontent data indicating the registration location of such content, andarea information indicating the specific area to which such content maybe downloaded by the mobile terminal, comprising the following stepsexecuted by the information distribution server: a step in whichguidance information on the content that may be downloaded by the mobileterminal is distributed to the mobile terminal; a step in which acontent distribution request is received from the mobile terminal; astep in which the position of the mobile terminal is determined; a stepin which the position of the mobile terminal as determined by theposition judgment means is checked against the area informationassociated with the content whose distribution is requested and decisionis made whether to distribute the content data in question; and a stepin which the content data is distributed to the mobile terminal inaccordance with the judgment result; as well as the following stepsexecuted by the mobile terminal: a step in which information on thecurrent position of the mobile terminal is transmitted to theinformation distribution server; and a step in which content to bedownloaded is selected according to the content guide informationdistributed by the information distribution server and a distributionrequest is made to the information distribution server.
 11. Theinformation distribution method according to claim 10, wherein themobile terminal further executes: a step in which the current positionof the mobile terminal is determined; and a step in which the currentposition information generated by the current position detection meansis transmitted to the information distribution server; and theinformation distribution server further executes: a step in which thecurrent position of the mobile terminal is determined according to thecurrent position information received from the mobile terminal inquestion.
 12. An information distribution method for distributinginformation between a mobile terminal and an information distributionserver equipped with a content database that associates and memorizescontent downloadable to the mobile terminal, or content data indicatingthe registration location of such content, and area informationindicating the specific area to which such content may be downloaded bythe mobile terminal, comprising the following steps executed by theinformation distribution server: a step in which a content distributionrequest is received from the mobile terminal; a step in which a routesearch is conducted according to the route search request sent from themobile terminal; and a route search result transmission step in whichthe results of the route search are transmitted to the mobile terminal;as well as the following steps executed by the mobile terminal: a stepin which the current position of the mobile terminal is determined; astep in which current position information generated by the currentposition detection means is transmitted; a step in which a route searchrequest is transmitted to the information distribution server; a step inwhich content to be downloaded is selected according to the contentinformation distributed by the information distribution server and adistribution request is made to the information distribution server; anda step in which content data is received from the informationdistribution server; where the route search result transmission stepincludes the process by which the information distribution server will,via the route search result transmission means, add the content guideinformation matching the area information to the route search results asa download point, and transmit the same in the case where the routesearch results show that the mobile terminal is passing through an areathat matches the area information.
 13. An information distributionmethod employing an information distribution server equipped with acontent database that associates and memorizes content downloadable to amobile terminal, or content data indicating the registration location ofsuch content, and area information indicating the specific area to whichsuch content may be downloaded by the mobile terminal, and distributesthe content data requested by the mobile terminal, comprising thefollowing steps executed by the information distribution server: acontent guide information distributing step in which guidanceinformation on the content downloadable by the mobile terminal isdistributed to the mobile terminal; a step in which a contentdistribution request is received from the mobile terminal; a step inwhich the position of the mobile terminal is determined; a step in whichthe position of the mobile terminal as determined by the positionjudgment means is checked against the area information associated withthe content whose distribution is requested and a decision is madewhether to distribute the content data in question; and a step in whichthe content data is distributed to the mobile terminal in accordancewith the judgment result.
 14. The information distribution methodaccording to claim 13, wherein the information distribution serverexecutes a further step whereby current position information generatedby the mobile terminal according to the output of the current positiondetection means is received, and the current position of the mobileterminal in question is determined according to the current positioninformation received.
 15. An information distribution method thatemploys an information distribution server equipped with a contentdatabase that associates and memorizes content downloadable to a mobileterminal, or content data indicating the registration location of suchcontent, and area information indicating the specific area to which suchcontent may be downloaded by the mobile terminal, and distributescontent data requested by the mobile terminal, comprising the followingsteps executed by the information distribution server: a step in which acontent distribution request is received from a mobile terminal; a stepin which a route search is conducted according to the route searchrequest sent from the mobile terminal; and a route search resulttransmission step in which the results of the route search aretransmitted to the mobile terminal; where the route search resulttransmission step includes the process by which the informationdistribution server will, via the route search result transmissionmeans, add the content guide information matching the area informationto the route search results as a download point, and transmit the samein the case where the route search results show that the mobile terminalis passing through an area that matches the area information.